1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2017 Chelsio Communications, Inc.
5 * Copyright (c) 2017 Conrad Meyer <[email protected]>
6 * All rights reserved.
7 * Largely borrowed from ccr(4), Written by: John Baldwin <[email protected]>
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include "opt_ddb.h"
35
36 #include <sys/param.h>
37 #include <sys/bus.h>
38 #include <sys/lock.h>
39 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/mutex.h>
42 #include <sys/module.h>
43 #include <sys/random.h>
44 #include <sys/sglist.h>
45 #include <sys/sysctl.h>
46
47 #ifdef DDB
48 #include <ddb/ddb.h>
49 #endif
50
51 #include <dev/pci/pcivar.h>
52
53 #include <dev/random/randomdev.h>
54
55 #include <opencrypto/cryptodev.h>
56 #include <opencrypto/xform.h>
57
58 #include "cryptodev_if.h"
59
60 #include "ccp.h"
61 #include "ccp_hardware.h"
62
63 MALLOC_DEFINE(M_CCP, "ccp", "AMD CCP crypto");
64
65 /*
66 * Need a global softc available for garbage random_source API, which lacks any
67 * context pointer. It's also handy for debugging.
68 */
69 struct ccp_softc *g_ccp_softc;
70
71 bool g_debug_print = false;
72 SYSCTL_BOOL(_hw_ccp, OID_AUTO, debug, CTLFLAG_RWTUN, &g_debug_print, 0,
73 "Set to enable debugging log messages");
74
75 static struct pciid {
76 uint32_t devid;
77 const char *desc;
78 } ccp_ids[] = {
79 { 0x14561022, "AMD CCP-5a" },
80 { 0x14681022, "AMD CCP-5b" },
81 { 0x15df1022, "AMD CCP-5a" },
82 };
83
84 static struct random_source random_ccp = {
85 .rs_ident = "AMD CCP TRNG",
86 .rs_source = RANDOM_PURE_CCP,
87 .rs_read = random_ccp_read,
88 };
89
90 /*
91 * ccp_populate_sglist() generates a scatter/gather list that covers the entire
92 * crypto operation buffer.
93 */
94 static int
ccp_populate_sglist(struct sglist * sg,struct crypto_buffer * cb)95 ccp_populate_sglist(struct sglist *sg, struct crypto_buffer *cb)
96 {
97 int error;
98
99 sglist_reset(sg);
100 switch (cb->cb_type) {
101 case CRYPTO_BUF_MBUF:
102 error = sglist_append_mbuf(sg, cb->cb_mbuf);
103 break;
104 case CRYPTO_BUF_UIO:
105 error = sglist_append_uio(sg, cb->cb_uio);
106 break;
107 case CRYPTO_BUF_CONTIG:
108 error = sglist_append(sg, cb->cb_buf, cb->cb_buf_len);
109 break;
110 case CRYPTO_BUF_VMPAGE:
111 error = sglist_append_vmpages(sg, cb->cb_vm_page,
112 cb->cb_vm_page_len, cb->cb_vm_page_offset);
113 break;
114 default:
115 error = EINVAL;
116 }
117 return (error);
118 }
119
120 static int
ccp_probe(device_t dev)121 ccp_probe(device_t dev)
122 {
123 struct pciid *ip;
124 uint32_t id;
125
126 id = pci_get_devid(dev);
127 for (ip = ccp_ids; ip < &ccp_ids[nitems(ccp_ids)]; ip++) {
128 if (id == ip->devid) {
129 device_set_desc(dev, ip->desc);
130 return (0);
131 }
132 }
133 return (ENXIO);
134 }
135
136 static void
ccp_initialize_queues(struct ccp_softc * sc)137 ccp_initialize_queues(struct ccp_softc *sc)
138 {
139 struct ccp_queue *qp;
140 size_t i;
141
142 for (i = 0; i < nitems(sc->queues); i++) {
143 qp = &sc->queues[i];
144
145 qp->cq_softc = sc;
146 qp->cq_qindex = i;
147 mtx_init(&qp->cq_lock, "ccp queue", NULL, MTX_DEF);
148 /* XXX - arbitrarily chosen sizes */
149 qp->cq_sg_crp = sglist_alloc(32, M_WAITOK);
150 /* Two more SGEs than sg_crp to accommodate ipad. */
151 qp->cq_sg_ulptx = sglist_alloc(34, M_WAITOK);
152 qp->cq_sg_dst = sglist_alloc(2, M_WAITOK);
153 }
154 }
155
156 static void
ccp_free_queues(struct ccp_softc * sc)157 ccp_free_queues(struct ccp_softc *sc)
158 {
159 struct ccp_queue *qp;
160 size_t i;
161
162 for (i = 0; i < nitems(sc->queues); i++) {
163 qp = &sc->queues[i];
164
165 mtx_destroy(&qp->cq_lock);
166 sglist_free(qp->cq_sg_crp);
167 sglist_free(qp->cq_sg_ulptx);
168 sglist_free(qp->cq_sg_dst);
169 }
170 }
171
172 static int
ccp_attach(device_t dev)173 ccp_attach(device_t dev)
174 {
175 struct ccp_softc *sc;
176 int error;
177
178 sc = device_get_softc(dev);
179 sc->dev = dev;
180
181 sc->cid = crypto_get_driverid(dev, sizeof(struct ccp_session),
182 CRYPTOCAP_F_HARDWARE);
183 if (sc->cid < 0) {
184 device_printf(dev, "could not get crypto driver id\n");
185 return (ENXIO);
186 }
187
188 error = ccp_hw_attach(dev);
189 if (error != 0)
190 return (error);
191
192 mtx_init(&sc->lock, "ccp", NULL, MTX_DEF);
193
194 ccp_initialize_queues(sc);
195
196 if (g_ccp_softc == NULL) {
197 g_ccp_softc = sc;
198 if ((sc->hw_features & VERSION_CAP_TRNG) != 0)
199 random_source_register(&random_ccp);
200 }
201
202 return (0);
203 }
204
205 static int
ccp_detach(device_t dev)206 ccp_detach(device_t dev)
207 {
208 struct ccp_softc *sc;
209
210 sc = device_get_softc(dev);
211
212 mtx_lock(&sc->lock);
213 sc->detaching = true;
214 mtx_unlock(&sc->lock);
215
216 crypto_unregister_all(sc->cid);
217 if (g_ccp_softc == sc && (sc->hw_features & VERSION_CAP_TRNG) != 0)
218 random_source_deregister(&random_ccp);
219
220 ccp_hw_detach(dev);
221 ccp_free_queues(sc);
222
223 if (g_ccp_softc == sc)
224 g_ccp_softc = NULL;
225
226 mtx_destroy(&sc->lock);
227 return (0);
228 }
229
230 static void
ccp_init_hmac_digest(struct ccp_session * s,const char * key,int klen)231 ccp_init_hmac_digest(struct ccp_session *s, const char *key, int klen)
232 {
233 union authctx auth_ctx;
234 struct auth_hash *axf;
235 u_int i;
236
237 /*
238 * If the key is larger than the block size, use the digest of
239 * the key as the key instead.
240 */
241 axf = s->hmac.auth_hash;
242 if (klen > axf->blocksize) {
243 axf->Init(&auth_ctx);
244 axf->Update(&auth_ctx, key, klen);
245 axf->Final(s->hmac.ipad, &auth_ctx);
246 explicit_bzero(&auth_ctx, sizeof(auth_ctx));
247 klen = axf->hashsize;
248 } else
249 memcpy(s->hmac.ipad, key, klen);
250
251 memset(s->hmac.ipad + klen, 0, axf->blocksize - klen);
252 memcpy(s->hmac.opad, s->hmac.ipad, axf->blocksize);
253
254 for (i = 0; i < axf->blocksize; i++) {
255 s->hmac.ipad[i] ^= HMAC_IPAD_VAL;
256 s->hmac.opad[i] ^= HMAC_OPAD_VAL;
257 }
258 }
259
260 static bool
ccp_aes_check_keylen(int alg,int klen)261 ccp_aes_check_keylen(int alg, int klen)
262 {
263
264 switch (klen * 8) {
265 case 128:
266 case 192:
267 if (alg == CRYPTO_AES_XTS)
268 return (false);
269 break;
270 case 256:
271 break;
272 case 512:
273 if (alg != CRYPTO_AES_XTS)
274 return (false);
275 break;
276 default:
277 return (false);
278 }
279 return (true);
280 }
281
282 static void
ccp_aes_setkey(struct ccp_session * s,int alg,const void * key,int klen)283 ccp_aes_setkey(struct ccp_session *s, int alg, const void *key, int klen)
284 {
285 unsigned kbits;
286
287 if (alg == CRYPTO_AES_XTS)
288 kbits = (klen / 2) * 8;
289 else
290 kbits = klen * 8;
291
292 switch (kbits) {
293 case 128:
294 s->blkcipher.cipher_type = CCP_AES_TYPE_128;
295 break;
296 case 192:
297 s->blkcipher.cipher_type = CCP_AES_TYPE_192;
298 break;
299 case 256:
300 s->blkcipher.cipher_type = CCP_AES_TYPE_256;
301 break;
302 default:
303 panic("should not get here");
304 }
305
306 s->blkcipher.key_len = klen;
307 memcpy(s->blkcipher.enckey, key, s->blkcipher.key_len);
308 }
309
310 static bool
ccp_auth_supported(struct ccp_softc * sc,const struct crypto_session_params * csp)311 ccp_auth_supported(struct ccp_softc *sc,
312 const struct crypto_session_params *csp)
313 {
314
315 if ((sc->hw_features & VERSION_CAP_SHA) == 0)
316 return (false);
317 switch (csp->csp_auth_alg) {
318 case CRYPTO_SHA1_HMAC:
319 case CRYPTO_SHA2_256_HMAC:
320 case CRYPTO_SHA2_384_HMAC:
321 case CRYPTO_SHA2_512_HMAC:
322 if (csp->csp_auth_key == NULL)
323 return (false);
324 break;
325 default:
326 return (false);
327 }
328 return (true);
329 }
330
331 static bool
ccp_cipher_supported(struct ccp_softc * sc,const struct crypto_session_params * csp)332 ccp_cipher_supported(struct ccp_softc *sc,
333 const struct crypto_session_params *csp)
334 {
335
336 if ((sc->hw_features & VERSION_CAP_AES) == 0)
337 return (false);
338 switch (csp->csp_cipher_alg) {
339 case CRYPTO_AES_CBC:
340 if (csp->csp_ivlen != AES_BLOCK_LEN)
341 return (false);
342 break;
343 case CRYPTO_AES_ICM:
344 if (csp->csp_ivlen != AES_BLOCK_LEN)
345 return (false);
346 break;
347 case CRYPTO_AES_XTS:
348 if (csp->csp_ivlen != AES_XTS_IV_LEN)
349 return (false);
350 break;
351 default:
352 return (false);
353 }
354 return (ccp_aes_check_keylen(csp->csp_cipher_alg,
355 csp->csp_cipher_klen));
356 }
357
358 static int
ccp_probesession(device_t dev,const struct crypto_session_params * csp)359 ccp_probesession(device_t dev, const struct crypto_session_params *csp)
360 {
361 struct ccp_softc *sc;
362
363 if (csp->csp_flags != 0)
364 return (EINVAL);
365 sc = device_get_softc(dev);
366 switch (csp->csp_mode) {
367 case CSP_MODE_DIGEST:
368 if (!ccp_auth_supported(sc, csp))
369 return (EINVAL);
370 break;
371 case CSP_MODE_CIPHER:
372 if (!ccp_cipher_supported(sc, csp))
373 return (EINVAL);
374 break;
375 case CSP_MODE_AEAD:
376 switch (csp->csp_cipher_alg) {
377 case CRYPTO_AES_NIST_GCM_16:
378 if (csp->csp_ivlen != AES_GCM_IV_LEN)
379 return (EINVAL);
380 if (csp->csp_auth_mlen < 0 ||
381 csp->csp_auth_mlen > AES_GMAC_HASH_LEN)
382 return (EINVAL);
383 if ((sc->hw_features & VERSION_CAP_AES) == 0)
384 return (EINVAL);
385 break;
386 default:
387 return (EINVAL);
388 }
389 break;
390 case CSP_MODE_ETA:
391 if (!ccp_auth_supported(sc, csp) ||
392 !ccp_cipher_supported(sc, csp))
393 return (EINVAL);
394 break;
395 default:
396 return (EINVAL);
397 }
398
399 return (CRYPTODEV_PROBE_HARDWARE);
400 }
401
402 static int
ccp_newsession(device_t dev,crypto_session_t cses,const struct crypto_session_params * csp)403 ccp_newsession(device_t dev, crypto_session_t cses,
404 const struct crypto_session_params *csp)
405 {
406 struct ccp_softc *sc;
407 struct ccp_session *s;
408 struct auth_hash *auth_hash;
409 enum ccp_aes_mode cipher_mode;
410 unsigned auth_mode;
411 unsigned q;
412
413 /* XXX reconcile auth_mode with use by ccp_sha */
414 switch (csp->csp_auth_alg) {
415 case CRYPTO_SHA1_HMAC:
416 auth_hash = &auth_hash_hmac_sha1;
417 auth_mode = SHA1;
418 break;
419 case CRYPTO_SHA2_256_HMAC:
420 auth_hash = &auth_hash_hmac_sha2_256;
421 auth_mode = SHA2_256;
422 break;
423 case CRYPTO_SHA2_384_HMAC:
424 auth_hash = &auth_hash_hmac_sha2_384;
425 auth_mode = SHA2_384;
426 break;
427 case CRYPTO_SHA2_512_HMAC:
428 auth_hash = &auth_hash_hmac_sha2_512;
429 auth_mode = SHA2_512;
430 break;
431 default:
432 auth_hash = NULL;
433 auth_mode = 0;
434 break;
435 }
436
437 switch (csp->csp_cipher_alg) {
438 case CRYPTO_AES_CBC:
439 cipher_mode = CCP_AES_MODE_CBC;
440 break;
441 case CRYPTO_AES_ICM:
442 cipher_mode = CCP_AES_MODE_CTR;
443 break;
444 case CRYPTO_AES_NIST_GCM_16:
445 cipher_mode = CCP_AES_MODE_GCTR;
446 break;
447 case CRYPTO_AES_XTS:
448 cipher_mode = CCP_AES_MODE_XTS;
449 break;
450 default:
451 cipher_mode = CCP_AES_MODE_ECB;
452 break;
453 }
454
455 sc = device_get_softc(dev);
456 mtx_lock(&sc->lock);
457 if (sc->detaching) {
458 mtx_unlock(&sc->lock);
459 return (ENXIO);
460 }
461
462 s = crypto_get_driver_session(cses);
463
464 /* Just grab the first usable queue for now. */
465 for (q = 0; q < nitems(sc->queues); q++)
466 if ((sc->valid_queues & (1 << q)) != 0)
467 break;
468 if (q == nitems(sc->queues)) {
469 mtx_unlock(&sc->lock);
470 return (ENXIO);
471 }
472 s->queue = q;
473
474 switch (csp->csp_mode) {
475 case CSP_MODE_AEAD:
476 s->mode = GCM;
477 break;
478 case CSP_MODE_ETA:
479 s->mode = AUTHENC;
480 break;
481 case CSP_MODE_DIGEST:
482 s->mode = HMAC;
483 break;
484 case CSP_MODE_CIPHER:
485 s->mode = BLKCIPHER;
486 break;
487 }
488
489 if (s->mode == GCM) {
490 if (csp->csp_auth_mlen == 0)
491 s->gmac.hash_len = AES_GMAC_HASH_LEN;
492 else
493 s->gmac.hash_len = csp->csp_auth_mlen;
494 } else if (auth_hash != NULL) {
495 s->hmac.auth_hash = auth_hash;
496 s->hmac.auth_mode = auth_mode;
497 if (csp->csp_auth_mlen == 0)
498 s->hmac.hash_len = auth_hash->hashsize;
499 else
500 s->hmac.hash_len = csp->csp_auth_mlen;
501 ccp_init_hmac_digest(s, csp->csp_auth_key, csp->csp_auth_klen);
502 }
503 if (cipher_mode != CCP_AES_MODE_ECB) {
504 s->blkcipher.cipher_mode = cipher_mode;
505 if (csp->csp_cipher_key != NULL)
506 ccp_aes_setkey(s, csp->csp_cipher_alg,
507 csp->csp_cipher_key, csp->csp_cipher_klen);
508 }
509
510 s->active = true;
511 mtx_unlock(&sc->lock);
512
513 return (0);
514 }
515
516 static void
ccp_freesession(device_t dev,crypto_session_t cses)517 ccp_freesession(device_t dev, crypto_session_t cses)
518 {
519 struct ccp_session *s;
520
521 s = crypto_get_driver_session(cses);
522
523 if (s->pending != 0)
524 device_printf(dev,
525 "session %p freed with %d pending requests\n", s,
526 s->pending);
527 s->active = false;
528 }
529
530 static int
ccp_process(device_t dev,struct cryptop * crp,int hint)531 ccp_process(device_t dev, struct cryptop *crp, int hint)
532 {
533 const struct crypto_session_params *csp;
534 struct ccp_softc *sc;
535 struct ccp_queue *qp;
536 struct ccp_session *s;
537 int error;
538 bool qpheld;
539
540 qpheld = false;
541 qp = NULL;
542
543 csp = crypto_get_params(crp->crp_session);
544 s = crypto_get_driver_session(crp->crp_session);
545 sc = device_get_softc(dev);
546 mtx_lock(&sc->lock);
547 qp = &sc->queues[s->queue];
548 mtx_unlock(&sc->lock);
549 error = ccp_queue_acquire_reserve(qp, 1 /* placeholder */, M_NOWAIT);
550 if (error != 0)
551 goto out;
552 qpheld = true;
553
554 error = ccp_populate_sglist(qp->cq_sg_crp, &crp->crp_buf);
555 if (error != 0)
556 goto out;
557
558 if (crp->crp_auth_key != NULL) {
559 KASSERT(s->hmac.auth_hash != NULL, ("auth key without HMAC"));
560 ccp_init_hmac_digest(s, crp->crp_auth_key, csp->csp_auth_klen);
561 }
562 if (crp->crp_cipher_key != NULL)
563 ccp_aes_setkey(s, csp->csp_cipher_alg, crp->crp_cipher_key,
564 csp->csp_cipher_klen);
565
566 switch (s->mode) {
567 case HMAC:
568 if (s->pending != 0) {
569 error = EAGAIN;
570 break;
571 }
572 error = ccp_hmac(qp, s, crp);
573 break;
574 case BLKCIPHER:
575 if (s->pending != 0) {
576 error = EAGAIN;
577 break;
578 }
579 error = ccp_blkcipher(qp, s, crp);
580 break;
581 case AUTHENC:
582 if (s->pending != 0) {
583 error = EAGAIN;
584 break;
585 }
586 error = ccp_authenc(qp, s, crp);
587 break;
588 case GCM:
589 if (s->pending != 0) {
590 error = EAGAIN;
591 break;
592 }
593 error = ccp_gcm(qp, s, crp);
594 break;
595 }
596
597 if (error == 0)
598 s->pending++;
599
600 out:
601 if (qpheld) {
602 if (error != 0) {
603 /*
604 * Squash EAGAIN so callers don't uselessly and
605 * expensively retry if the ring was full.
606 */
607 if (error == EAGAIN)
608 error = ENOMEM;
609 ccp_queue_abort(qp);
610 } else
611 ccp_queue_release(qp);
612 }
613
614 if (error != 0) {
615 DPRINTF(dev, "%s: early error:%d\n", __func__, error);
616 crp->crp_etype = error;
617 crypto_done(crp);
618 }
619 return (0);
620 }
621
622 static device_method_t ccp_methods[] = {
623 DEVMETHOD(device_probe, ccp_probe),
624 DEVMETHOD(device_attach, ccp_attach),
625 DEVMETHOD(device_detach, ccp_detach),
626
627 DEVMETHOD(cryptodev_probesession, ccp_probesession),
628 DEVMETHOD(cryptodev_newsession, ccp_newsession),
629 DEVMETHOD(cryptodev_freesession, ccp_freesession),
630 DEVMETHOD(cryptodev_process, ccp_process),
631
632 DEVMETHOD_END
633 };
634
635 static driver_t ccp_driver = {
636 "ccp",
637 ccp_methods,
638 sizeof(struct ccp_softc)
639 };
640
641 static devclass_t ccp_devclass;
642 DRIVER_MODULE(ccp, pci, ccp_driver, ccp_devclass, NULL, NULL);
643 MODULE_VERSION(ccp, 1);
644 MODULE_DEPEND(ccp, crypto, 1, 1, 1);
645 MODULE_DEPEND(ccp, random_device, 1, 1, 1);
646 #if 0 /* There are enough known issues that we shouldn't load automatically */
647 MODULE_PNP_INFO("W32:vendor/device", pci, ccp, ccp_ids,
648 nitems(ccp_ids));
649 #endif
650
651 static int
ccp_queue_reserve_space(struct ccp_queue * qp,unsigned n,int mflags)652 ccp_queue_reserve_space(struct ccp_queue *qp, unsigned n, int mflags)
653 {
654 struct ccp_softc *sc;
655
656 mtx_assert(&qp->cq_lock, MA_OWNED);
657 sc = qp->cq_softc;
658
659 if (n < 1 || n >= (1 << sc->ring_size_order))
660 return (EINVAL);
661
662 while (true) {
663 if (ccp_queue_get_ring_space(qp) >= n)
664 return (0);
665 if ((mflags & M_WAITOK) == 0)
666 return (EAGAIN);
667 qp->cq_waiting = true;
668 msleep(&qp->cq_tail, &qp->cq_lock, 0, "ccpqfull", 0);
669 }
670 }
671
672 int
ccp_queue_acquire_reserve(struct ccp_queue * qp,unsigned n,int mflags)673 ccp_queue_acquire_reserve(struct ccp_queue *qp, unsigned n, int mflags)
674 {
675 int error;
676
677 mtx_lock(&qp->cq_lock);
678 qp->cq_acq_tail = qp->cq_tail;
679 error = ccp_queue_reserve_space(qp, n, mflags);
680 if (error != 0)
681 mtx_unlock(&qp->cq_lock);
682 return (error);
683 }
684
685 void
ccp_queue_release(struct ccp_queue * qp)686 ccp_queue_release(struct ccp_queue *qp)
687 {
688
689 mtx_assert(&qp->cq_lock, MA_OWNED);
690 if (qp->cq_tail != qp->cq_acq_tail) {
691 wmb();
692 ccp_queue_write_tail(qp);
693 }
694 mtx_unlock(&qp->cq_lock);
695 }
696
697 void
ccp_queue_abort(struct ccp_queue * qp)698 ccp_queue_abort(struct ccp_queue *qp)
699 {
700 unsigned i;
701
702 mtx_assert(&qp->cq_lock, MA_OWNED);
703
704 /* Wipe out any descriptors associated with this aborted txn. */
705 for (i = qp->cq_acq_tail; i != qp->cq_tail;
706 i = (i + 1) % (1 << qp->cq_softc->ring_size_order)) {
707 memset(&qp->desc_ring[i], 0, sizeof(qp->desc_ring[i]));
708 }
709 qp->cq_tail = qp->cq_acq_tail;
710
711 mtx_unlock(&qp->cq_lock);
712 }
713
714 #ifdef DDB
715 #define _db_show_lock(lo) LOCK_CLASS(lo)->lc_ddb_show(lo)
716 #define db_show_lock(lk) _db_show_lock(&(lk)->lock_object)
717 static void
db_show_ccp_sc(struct ccp_softc * sc)718 db_show_ccp_sc(struct ccp_softc *sc)
719 {
720
721 db_printf("ccp softc at %p\n", sc);
722 db_printf(" cid: %d\n", (int)sc->cid);
723
724 db_printf(" lock: ");
725 db_show_lock(&sc->lock);
726
727 db_printf(" detaching: %d\n", (int)sc->detaching);
728 db_printf(" ring_size_order: %u\n", sc->ring_size_order);
729
730 db_printf(" hw_version: %d\n", (int)sc->hw_version);
731 db_printf(" hw_features: %b\n", (int)sc->hw_features,
732 "\20\24ELFC\23TRNG\22Zip_Compress\16Zip_Decompress\13ECC\12RSA"
733 "\11SHA\0103DES\07AES");
734
735 db_printf(" hw status:\n");
736 db_ccp_show_hw(sc);
737 }
738
739 static void
db_show_ccp_qp(struct ccp_queue * qp)740 db_show_ccp_qp(struct ccp_queue *qp)
741 {
742
743 db_printf(" lock: ");
744 db_show_lock(&qp->cq_lock);
745
746 db_printf(" cq_qindex: %u\n", qp->cq_qindex);
747 db_printf(" cq_softc: %p\n", qp->cq_softc);
748
749 db_printf(" head: %u\n", qp->cq_head);
750 db_printf(" tail: %u\n", qp->cq_tail);
751 db_printf(" acq_tail: %u\n", qp->cq_acq_tail);
752 db_printf(" desc_ring: %p\n", qp->desc_ring);
753 db_printf(" completions_ring: %p\n", qp->completions_ring);
754 db_printf(" descriptors (phys): 0x%jx\n",
755 (uintmax_t)qp->desc_ring_bus_addr);
756
757 db_printf(" hw status:\n");
758 db_ccp_show_queue_hw(qp);
759 }
760
DB_SHOW_COMMAND(ccp,db_show_ccp)761 DB_SHOW_COMMAND(ccp, db_show_ccp)
762 {
763 struct ccp_softc *sc;
764 unsigned unit, qindex;
765
766 if (!have_addr)
767 goto usage;
768
769 unit = (unsigned)addr;
770
771 sc = devclass_get_softc(ccp_devclass, unit);
772 if (sc == NULL) {
773 db_printf("No such device ccp%u\n", unit);
774 goto usage;
775 }
776
777 if (count == -1) {
778 db_show_ccp_sc(sc);
779 return;
780 }
781
782 qindex = (unsigned)count;
783 if (qindex >= nitems(sc->queues)) {
784 db_printf("No such queue %u\n", qindex);
785 goto usage;
786 }
787 db_show_ccp_qp(&sc->queues[qindex]);
788 return;
789
790 usage:
791 db_printf("usage: show ccp <unit>[,<qindex>]\n");
792 return;
793 }
794 #endif /* DDB */
795